NFS nanofiltration membranes are introduced for waterflood injection where they deliver sulfate rejection.
Nanofiltration separation in sulfate removal with NFS is said to offer a 30% efficiency increase and potential reduction in NF system footprint. It provides a consistent 99.5% average sulfate rejection. In seawater, sulfate ions interact with barium and strontium to result in scale formation that significantly reduces process output and efficiency. NFS membranes are engineered to help overcome this situation.